虹吸现象:物理( )
A.黄金分割线:数学 B.瓦特:化学C.恐龙:植物 D.光合作用:物理
参考答案:A
解析: 题干中两个词语是理论与所属学科的关系,故选A。
小明提出六个问题,请你根据实际情况用“Yes”或“No”回答。
1. Does a tiger have a trunk?
2. Does a zebra have fur?
3. Does an elephant have fur?
4. Does a snake live in a hole?
5. Does a panda live in a forest?
6. Does a giraffe eat leaves?
采用塞焊焊接不同厚度的金属时,应将较薄的金属板放在上面。